19701020

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{79}}^1\times {\mathrm{337}}^1$

素因数の和:462

約数の個数: 48

約数和(自身を含む): 43155840

約数和(自身を除く): 23454820

約数列:

[1, 2, 4, 5, 10, 20, 37, 74, 79, 148, 158, 185, 316, 337, 370, 395, 674, 740, 790, 1348, 1580, 1685, 2923, 3370, 5846, 6740, 11692, 12469, 14615, 24938, 26623, 29230, 49876, 53246, 58460, 62345, 106492, 124690, 133115, 249380, 266230, 532460, 985051, 1970102, 3940204, 4925255, 9850510, 19701020]

約数ペア:

[(1, 19701020), (2, 9850510), (4, 4925255), (5, 3940204), (10, 1970102), (20, 985051), (37, 532460), (74, 266230), (79, 249380), (148, 133115), (158, 124690), (185, 106492), (316, 62345), (337, 58460), (370, 53246), (395, 49876), (674, 29230), (740, 26623), (790, 24938), (1348, 14615), (1580, 12469), (1685, 11692), (2923, 6740), (3370, 5846)]